I recently was on a business trip when I stop into a Bass Pro Shops to do some shopping. I went into their fly fishing section. I saw a video entitled "Selective Strategies For Trout" being played on one of their televisions to help the sale of the video. First, the video was excellent. The fisherman on the video was using copper sleeves on his leader to weigh nymphs to help them get down faster to the bottom. Where can one find copper sleeves to place on their leader? I am fairly new to fly fishing and I have not found anything like copper sleeves being sold by any fly fishing supplier. Could anyone help me find where these copper sleeves could be purchased. They seem to be effective and the video stated that they went through the guides of your fly rod very easy. Has anyone on the bulletin board used copper sleeves to weight their nymphs?